EP1931826B1 - Papiersystem zur minderung von abscheidungen und verstopfungen auf einer maschine bei der papier- und kartonherstellung - Google Patents

Papiersystem zur minderung von abscheidungen und verstopfungen auf einer maschine bei der papier- und kartonherstellung Download PDF

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Publication number
EP1931826B1
EP1931826B1 EP06808120A EP06808120A EP1931826B1 EP 1931826 B1 EP1931826 B1 EP 1931826B1 EP 06808120 A EP06808120 A EP 06808120A EP 06808120 A EP06808120 A EP 06808120A EP 1931826 B1 EP1931826 B1 EP 1931826B1
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EP
European Patent Office
Prior art keywords
polymer substance
micronized
plant additive
paper
suspension
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EP06808120A
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English (en)
French (fr)
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EP1931826A2 (de
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Daniel Gomez
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Kemira Oyj
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Individual
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Priority to SI200631426T priority Critical patent/SI1931826T1/sl
Priority to PL06808120T priority patent/PL1931826T3/pl
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/02—Material of vegetable origin
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D21H17/29—Starch cationic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • D21H17/45—Nitrogen-containing groups
    • D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/52—Epoxy resins
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape

Definitions

  • the present invention relates to a new technical solution to solve the technical problem of the reduction of organic deposits and machine fouling at the origin of cleanings, stops and breakages during the manufacture of paper and cardboard, especially when uses fibrous pulps containing or consisting of recycled fibers.
  • the manufacture of paper and cardboard uses a set of raw materials, natural, mineral and synthetic. These materials are essentially cellulosic fibers of softwood and / or hardwood, annuals, by-products of the wood industry, subjected to a delignification chemical treatment followed or not by a bleaching operation for the manufacture of pasta unbleached or bleached chemicals. These materials may also be subjected to mechanical pressure treatments, with or without chemical treatment, with or without bleaching, for the manufacture of mechanical, thermomechanical or chemi-thermomechanical pulps which are unbleached or bleached.
  • the recycling of paper and cardboard is an important objective for meeting environmental requirements in order to (i) better manage forests, and (ii) meet the new obligations of sustainable development.
  • the manufacture of paper and cardboard is increasingly using recovery fibers.
  • the recovery fibers are used after deinking treatment followed, where appropriate, by bleaching technologies well known to those skilled in the art, in order to confer on the recycled fiber material the level of whiteness required. for the appearance properties of the paper.
  • Recycled fibers can be used alone or mixed with virgin, chemical, mechanical or thermomechanical pulp from softwood or hardwood.
  • FR 2 624 531 A and his European correspondent EP 0 344 265 A describe methods for (i) decreasing density, (ii) increasing bulk and porosity, and (iii) accelerating the dewatering and drying of paper and board at medium of a vegetable load having a particle size, a physical surface area and a low hydraulic surface area.
  • FR 2,624,531 (see page 18 lines 18-23) teaches, for the manufacture of papers, that this vegetable filler is introduced into the mass before flocculation: (a) an aqueous suspension containing fibers is prepared by mixing, said vegetable filler and an organic binder; (which is usually anionic), then (b) the addition of a cationic flocculant destabilizes said suspension and causes flocculation of the whole at the headbox.
  • EP 0 645 491 A and EP 0 644 293 A describe the manufacture of papers from a mixture of recycled fibers, a binding agent and a finely divided vegetable load (from waste grains or pressed grapes, according to EP 0 645 491 A , or residues of beet pulp, according to EP 0644 293 A ).
  • EP 0 645 491 A also indicates (see page 2 line 57 to page 3 line 5, and example 1) that the water sensitivity of the vegetable load of this mixture can be reduced by means of colloids or agglomerates, for example: starches cationic starches, aluminum salts or cationizing agents, and that plant wastes, such as cereals, containing starch can be cationized.
  • the paper industry offers special chemical additives and / or synthetic polymers for improving certain properties of paper and paperboard (hand, acceleration drainage, training, etc ...) and for the treatment of white water to reduce fouling, the proliferation of biological deposits or slimes. These deposits are formed in the process water, foul the skins, affect productivity, quality and may also cause paper contamination (presence of stains, blackheads, microbiological cleanliness).
  • the water-soluble or water-dispersible additives go into solution and they are either dissolved or dispersed in the form of very small particles of submicron size forming colloids or anionic (in general) or nonionic.
  • Anionic colloids are identified by the measurement of cationic demand. They are precipitable by physico-chemical destabilization. Their re-agglomeration causes sticky deposits in the wet part of the paper machine. Nonionic colloids can be reagglomerate during drying and cause sticky deposition in drying.
  • Impurities larger than 70 ⁇ m present in the pulper after resuspension of the pulp can be removed by mechanical methods such as grading and fine purification. Some dissolved materials in the water may be neutralized by mineral particles (micronized talc). There are also methods of complexing calcium to prevent calcium carbonate deposits. Papermakers are also familiar with anti-slime treatments. These fouling problems are mainly notable for the manufacture of corrugated paper, magazine papers (LWC), single or multi-jet cartons using increasing rates, or even 100%, of recovered fibers. .
  • the specific water consumption can vary approximately 3-5 m 3 / ton for the manufacture of corrugated paper and for single- or multi-ply board, 10-12 m 3 / ton for newsprint , 5-7 m 3 / ton for domestic and sanitary paper (virgin pulp) and 6-8 m 3 / ton for writing paper.
  • the paper industry has also developed various processes and offers organic and / or synthetic anionic or cationic additives to improve the retention of dissolved organic and synthetic materials in white waters. These treatments are biological, membrane, physico-chemical or use coagulation / flocculation / decantation or flotation techniques; used alone or in combination.
  • MES suspended solids
  • COD chemical oxygen demand
  • cationic demand which characterizes the anionic charge of the dispersed materials.
  • the present invention recommends a new technical solution for the reduction of organic deposits and machine fouling at the origin of stops and breakages during the manufacture of paper and paperboard, especially when using recycled fibers or paper fiber and recycled fiber blends.
  • This new solution uses a plant system in which a micronized plant additive is associated with a cationic polymer substance.
  • vegetable additive is meant here a cellulosic powder, that is to say a material that is derived from a plant material containing cellulose.
  • micronized vegetable additive associated with a cationic polymeric substance is meant that at least a portion of the cationic polymeric substance has has been adsorbed by the micronized plant additive, so that said plant additive comprises cationic groups. It can thus be said that the vegetable additive is “activated” by said cationic polymer substance.
  • a paper system for the reduction of deposits, fouling and breakages during the manufacture of paper and paperboard, especially when this manufacture uses recycled fibers or a mixture of fibers.
  • paper and recycled fiber said system being characterized in that it comprises a micronized plant additive previously associated with a cationic polymer substance selected from the group consisting of cationic polymers, cationic copolymers and mixtures thereof, said polymer substance belonging to to the family of polyacrylamides, polyamines, polyethyleneimines, adducts of dicyandiamide with formaldehyde and / or ethylene oxide and mixtures thereof, said system being intended, in the manufacture of paper and board, to be introduced into aqueous suspension in the fiber suspension.
  • a method of preparing such a system comprising the treatment of the micronized vegetable additive and having a moisture of less than 30% and preferably less than 20%, by mixing with a cationic polymer substance with stirring, said cationic polymer substance being chosen from the group consisting of cationic polymers, cationic copolymers and their mixtures, said cationic polymeric substance belonging to the family of polyacrylamides polyamines, polyethyleneimines, adducts of dicyandiamide with formaldehyde and / or ethylene oxide and mixtures thereof.
  • a system for the reduction of deposits, fouling and breaks on production machine paper and cardboard may contain recycled fibers and in particular corrugated papers, LWC papers, adsorption and fixation of organic substances, which are dissolved or hydrodispersed, and / or "stickies” (ie stickies) in the process water.
  • the new technical solution according to the invention therefore uses a micronized vegetable additive, which is ecru or bleached.
  • This vegetable additive is "activated" by contacting, dry or in aqueous suspension, with a cationic polymer substance, the resulting mixture being introduced into the aqueous suspension of fibers that may contain recycled fibers.
  • the molecular weight of the cationic polymer substance is advantageously between 10,000 and 800,000 depending on the application before its introduction into a fibrous suspension containing recycled fibers.
  • Said cationic polymer substance is used according to the invention at a content of between 0.05 and 5 kg / ton of micronized vegetable additive, preferably a content of 0.1 to 2 kg / ton of micronized vegetable additive.
  • the cationisation treatment of the micronized vegetable additive may be carried out either directly on the vegetable additive, after its micronisation, by contacting in the dry state with the cationic polymer substance, or by contacting in the wet state. after being suspended in water and then adding the cationic polymeric substance to the resulting suspension. It is recommended that in each case the vegetable additive used should be dry (at 23 ° C), a humidity (ie total water content) of less than 30% and preferably less than 20%.
  • the micronized vegetable additive may be previously subjected to a heat treatment with dry steam between 100 and 180 ° C to increase its specific surface area.
  • a heat treatment with dry steam between 100 and 180 ° C to increase its specific surface area.
  • the contact treatment with the cationic polymer substance or "cationic activation” is intended to facilitate the adsorption and fixation of organic substances dissolved or dispersed in the paper-making waters and cardboard with recycled fibers causing deposits on the skins and machine fouling with loss of productivity due to breaks and stops for cleaning.
  • micronized, unbleached or whitened plant additive allows, on the one hand, the realization of a micronized complex chemico-vegetal dual ionic (plant additive / cationic polymer) for the fixation of dissolved or hydrodispersed organic materials in essentially anionic white waters, stickies and microstickies less than 70 ⁇ m in size not accessible by conventional chemical treatments and, secondly, the fixing of the complex thus obtained, in view of its size and reactivity, in the pores fiber / filler texture and its removal by holding in the sheet of paper or cardboard.
  • the micronized vegetable additive is preferably micronized wood powder obtained by grinding-micronization from by-products of the woodworking and sawing industries. It can also come from by-products of agricultural production, especially cereals, for example it can be obtained by grinding maize cobs. As indicated above, it has a moisture content of less than 30%, preferably a humidity of less than 20%, and a particle size of between 10 and 500 ⁇ m and preferably between 10 and 350 ⁇ m.
  • the new technical solution according to the invention is of significant interest compared to that of the document FR 2 624 531 A supra.
  • the micronized additive according to the old technique has a particle size distribution favorable to its mechanical fixation in the fibrous texture (retention greater than 90%), but it has not undergone any anionic, cationic or thermal chemical treatment and has not therefore no ionic affinity with the cellulose fibers and / or the water-dispersible organic matter contained in the white waters.
  • this additive of low physical and hydraulic specific surface area offers numerous advantages for the manufacture of paper and board (improvement of the cross section of the sheet, acceleration of the dripping and drying, increase of the thickness, porosity ”) but does not allow the fixation of organic substances contained in the manufacturing water when using recovery fibers, therefore has no effect on the reduction of deposits and machine fouling related to the presence dissolved or water-dispersed substances in the form of very small particles which may have sizes of less than 5 ⁇ m forming colloids whether anionic or nonionic.
  • the anionic and nonionic colloids agglomerate and form sticky deposits in the wet part of the paper machine and in drying.
  • the prior thermal activation of the vegetable additive alone can already be useful for the manufacture of paper containing recycled fibers because it results in a 100-fold efficiency of the adsorption power of the vegetable additive, and therefore has a favorable effect on the fixation of the contaminating organic substances contained in the waters.
  • the physical surface area measured with a mercury porosimeter may vary according to the duration of the treatment and the temperature, from 10 to 200 g / m 2 . It is however better to combine the thermal and chemical action for maximum efficiency of the positive effect on the reduction of machine fouling.
  • the plant system according to the invention which comprises the micronized and activated plant additive, or "dual complex" is a support for the retention of organic contaminating substances contained in the water and eliminated in the mass of paper and cardboard that it either single or multi-jet with reduced deposits in the circuits and on the cladding (fabrics and felts of presses and dryers). According to the invention, the contaminants are trapped in the mass during the formation of the paper or cardboard and do not redeposit on the dressings of the paper machine or cardboard.
  • This new activated micronized vegetable material combines the advantages already obtained with the micronized additive of the old technique, namely the improvement of the quality of the paper-board (formation of the sheet, reduction of the dispersions of the profiles, increase of the hand) , a productivity gain by the acceleration of dripping and drying, on the one hand, to those of the effect of reducing fouling on the machine, on the other hand. Both effects, thermal and chemical activation can be combined or not.
  • This technology can be particularly advantageous for the production of corrugated cardboard sheets which show high stopping rates given the high contamination of process water causing fouling and frequent stops for cleaning.
  • the micronized vegetable additive is suspended in water and then combined with said cationic polymer substance, the resulting suspension mixture being introduced into the fibrous suspension that may contain recycled fibers.
  • the micronized vegetable additive is dry blended with the cationic polymeric substance, before suspending the product resulting from said mixture in the fibrous suspension may contain recycled fibers.
  • micronized vegetable additive (i) to a heat treatment with dry steam between 100 and 180 ° C to increase its specific surface area before its association with the polymeric substance cationic, and / or (ii) prior bleaching treatment prior to its combination with the cationic polymeric substance.
  • a process for the manufacture of a sheet of paper or cardboard characterized in that it comprises the incorporation of a plant system according to the invention into the fiber suspension in a weight system / fiber ratio of between 0 is recommended. , 2/100 and 30/100, preferably a weight ratio of between 0.5 / 100 and 10/100.
  • one or more products chosen from nonionic surfactants, emulsifiers, colloids (in particular colloidal silica) and their mixtures can be incorporated in the plant system.
  • the preferred embodiment for carrying out the invention consists in carrying out a heat treatment, with dry steam, preferably after the micronisation of the vegetable additive and before its packaging (in a bag, in semi-bulk, in bulk or in a compressed bale). and delivery to the end user.
  • the cationic polymeric substance can be either directly injected into the plant additive after micronisation thereof, at a humidity of less than 30% and in particular less than 20%, using in particular a known spraying technique or batchwise in a vat containing the micronized vegetable additive suspended in water. This operation can also be performed continuously in the head circuits of the paper machine.
  • the unbleached or bleached micronized vegetable additive with a particle size ranging between 10 and 500 ⁇ m and preferably between 10 and 350 ⁇ m, is previously suspended at a concentration of between 0.05 and 10% (by weight relative to the weight fibers) in a disintegrating vat or a pulper under gentle agitation to avoid foams, before being introduced into the fiber suspension containing the recycled fibers.
  • This operation can be carried out continuously in the white waters upstream of the mixing pump before the introduction of the activated micronized vegetable additive into the fibrous suspension.
  • the cationic polymer substance is introduced into the plant additive at the preferential dose of 0.05 to 5 kg by weight and preferably at a dose of 0.1 to 2 kg per ton of micronized vegetable additive.
  • the dose of The polymer may be variable depending on the qualities of the fibers, the process waters and the fibrous composition. The best operating procedure for implementing the invention is presented in the figures 1 and 2 which are very explicit.
  • the dual complex has an immediate effect on the improvement of the cross section of the sheet, the acceleration of dripping and drying and the reduction of machine deposits.
  • the pollutant load in the white water can be easily controlled by measuring the Zeta potential of the manufacturing water and especially with high performance technologies developed by the so-called MUTEK-BTG company.
  • the reduction of the contamination of the cladding can also be analyzed by the "clogging test" developed at CTP (Center Technique du Textil) with a machine cloth dipped in white water (temperature control). The fabric is washed very lightly and then dried at room temperature. An image analysis makes it possible to measure the state of clogging of the fabric and to confirm the effectiveness of the present invention.
  • the vegetable additive is obtained from beech sawdust after milling and micronization at a humidity of less than 20% (at 23 ° C.) to obtain a particle size ranging between 10 and 350 ⁇ m. This vegetable additive has been used in the tests referred to in Table 1, hereinafter.
  • Table 1 gives, on the one hand, the quantities of the various ingredients used and, on the other hand, the results of the experiments carried out with a corrugated paper of 112 g / m 2 standard obtained (a) without the additive (control), (b) with said plant additive in accordance with the teaching of FR 2 624531 A and (c) with said activated vegetable additive according to the invention.
  • Table 1 thus shows the impact of the activation of said plant additive according to the present invention (activation with the cationic polymer substance directly injected by spraying on the plant additive after micronization or activation by introducing said cationic polymer substance into the additive plant in suspension in water) on the physical properties and potential advantages in reducing machine fouling.
  • the use of the system of the invention is favorable to a decrease in the sulphate content (from 500 to 200 times) and in chlorides. Ion demand is expected to be around 0 mV or slightly positive. Conductivity in white waters is reported to be decreasing. These forecast results should allow a better operation of the machine with a decrease in fouling.
  • the introduction of the new activated additive is favorable to a decrease in the sulphate content (from 500 to 200), in chlorides.
  • the ionic demand should be around 0 mv or slightly positive. Conductivity in white waters down.
  • the advantages obtained with Vemissa additive are found with this new products.
  • the vegetable additive is micronized sawdust to obtain a variable particle size between 10 and 350 microns.
  • the micronized vegetable additive is subjected to a heat treatment with dry steam at 130 - 180 ° C to increase the physical surface area from 10 to 200 g / m 2 .
  • the additive thus treated is prepared at a concentration varying between 5 and 10% in a head mixer before being incorporated in the fibrous suspension according to the Fig. 1 but without prior treatment of the micronized plant additive with a cationic polymer substance.
  • the cationic activation is obtained with a cationic polymer substance, which is an adduct of dicyandiamide and formaldehyde at a dose of 1 to 1.5 kg per ton of micronized fir wood with a particle size of between 10 and 350 ⁇ m.
  • This activation is directly obtained by injecting the polymer mixture by spraying into the plant additive after micronization.
  • Activation reduces water turbidity and deposition from about 0.020 to about 0.010 mg stickies per sheet, which is about 40% less fouling compared to paper mill processes with conventional chemical retention agents or binders.
  • the micronized vegetable additive is whitened according to a conventional bleaching technique of the stationery to obtain a whiteness variable between 70 and 75 °.
  • the micronized vegetable additive is activated according to the conditions of Example 3 and introduced into a fibrous suspension consisting of 100% by weight of deinked pulp for the production of newsprint and magazine. This operation results in the reduction of deposits from 0.018 to 0.013 mg of stickies per leaf, ie a reduction in fouling of 27%.
  • Example 4 The procedure is as in Example 4, with the difference that the activation of the fir wood powder, carried out with a cationic polymer substance which is the same adduct of dicyandiamine with formaldehyde (1 kg / ton of micronized vegetable additive ), is carried out in the presence of an emulsifier and colloidal silica (particle size: 5 nm).

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Claims (16)

  1. System zur Verringerung von Ablagerungen, Verstopfungen und Beschädigungen bei der Herstellung von Papier- und Pappesorten, insbesondere wenn bei dieser Herstellung Altpapier oder eine Mischung aus Zellstoff und Altpapier eingesetzt wird, wobei das System dadurch gekennzeichnet ist, dass es einen pflanzlichen Zusatzstoff, welcher zuvor mikronisiert wurde, in Verbindung mit einer Polymersubstanz umfasst, welche aus der Gesamtheit ausgewählt ist, die aus den kationischen Polymeren, den kationischen Copolymeren und deren Mischungen besteht, wobei die Polymersubstanz zur Familie der Polyacrylamide, Polyamine, Polyethylenimine, Additionsprodukte aus Dicyandiamid und aus Formaldehyd und/oder aus Ethylenoxid und deren Mischungen gehört, wobei das System dazu bestimmt ist, bei der Herstellung von Papier- und Pappesorten der Fasersuspension in einer wässrigen Suspension zugesetzt zu werden.
  2. System nach Anspruch 1, dadurch gekennzeichnet, dass die Polymersubstanz eine mittlere Molmasse im Bereich von 10.000 bis 800.000 hat und derart zur Anwendung kommt, dass ihr Gehalt im Bereich von 0,05 bis 5 kg/Tonne an mikronisiertem pflanzlichen Zusatzstoff liegt, wobei der Gehalt vorzugsweise 0,1 bis 2 kg/Tonne an mikronisiertem pflanzlichen Zusatzstoff beträgt.
  3. System nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass es erhalten wurde, indem der pflanzliche Zusatzstoff, welcher mikronisiert ist und einen Feuchtigkeitsgehalt von weniger als 30 % und vorzugsweise von weniger als 20 % hat, mit einer kationischen Polymersubstanz unter Rühren behandelt wurde.
  4. System nach Anspruch 3, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff im trockenen Zustand mit der kationischen Polymersubstanz vermischt wird, bevor das Produkt, welches bei dem Mischvorgang erhalten wurde, der Fasersuspension, welche Altpapier enthalten kann, zugesetzt wird.
  5. System nach Anspruch 3, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff in Wasser in Suspension gebracht wurde, woraufhin er mit der Polymersubstanz in Verbindung gebracht wurde, wobei die dabei erhaltene Mischung, die in Suspension vorliegt, der Fasersuspension, welche Altpapier enthalten kann, zugesetzt wird.
  6. System nach einem beliebigen der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass es sich bei dem pflanzlichen Zusatzstoff
    um mikronisiertes Holzmehl, das von Nadelbäumen und/oder von Laubbäume stammt, um Mehl aus Holzabfällen,
    um Mehl aus landwirtschaftlichen Nebenprodukten, insbesondere solches aus Getreide, oder
    um eine von deren Mischungen handelt,
    und er eine mittlere Korngröße im Bereich von 10 bis 500 µm, vorzugsweise eine mittlere Korngröße im Bereich von 10 bis 350 µm, aufweist.
  7. System nach einem beliebigen der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff einer bleichenden Vorbehandlung unterzogen wurde, bevor er mit der kationischen Polymersubstanz in Verbindung gebracht wird.
  8. System nach einem beliebigen der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff einer Wärmebehandlung mit Trockendampf zwischen 100 und 180 °C unterzogen wurde, um seine spezifische Oberfläche zu erhöhen, bevor er mit der kationischen Polymersubstanz in Verbindung gebracht wird.
  9. Verfahren zur Herstellung eines Systems nach einem beliebigen der Ansprüche 1 bis 8, wobei das Verfahren dadurch gekennzeichnet ist, dass es die Behandlung des pflanzlichen Zusatzstoffs, welcher mikronisiert ist und einen Feuchtigkeitsgehalt von weniger als 30 % und vorzugsweise von weniger als 20 % aufweist, durch Vermischen mit einer kationischen Polymersubstanz unter Rühren umfasst, wobei die kationische Polymersubstanz aus der Gesamtheit ausgewählt ist, die aus den kationischen Polymeren, den kationischen Copolymeren und deren Mischungen besteht, wobei die Polymersubstanz zur Familie der Polyacrylamide, Polyamine, Polyethylenimine, Additionsprodukte von Dicyandiamid und Formaldehyd und/oder Ethylenoxid und deren Mischungen gehört.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff in Wasser in Suspension gebracht wird, woraufhin er mit der kationischen Polymersubstanz in Verbindung gebracht wird, wobei die dabei erhaltene Mischung, die in Suspension vorliegt, der Fasersuspension zugesetzt wird, welche Altpapier enthalten kann.
  11. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass es sich bei dem pflanzlichen Zusatzstoff um mikronisiertes Holzmehl handelt, das von Nadelbäumen und/oder Laubbäumen stammt und eine mittlere Korngröße im Bereich von 10 bis 500 µm, vorzugsweise eine mittlere Korngröße im Bereich von 10 bis 350 µm, hat.
  12. Verfahren nach einem beliebigen der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff einer bleichenden Vorbehandlung unterzogen wurde, bevor er mit der kationischen Polymersubstanz in Verbindung gebracht wird.
  13. Verfahren nach einem beliebigen der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff einer Wärmebehandlung mit Trockendampf zwischen 100 und 180 °C unterzogen wurde, um seine spezifische Oberfläche zu erhöhen, bevor er mit der kationischen Polymersubstanz in Verbindung gebracht wird.
  14. Verwendung eines Systems nach einem beliebigen der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass ein solches System zur Anwendung kommt, um Ablagerungen, Verstopfungen und Beschädigungen an Maschinen zur Herstellung von Papier- und Pappesorten, die Altpapier enthalten können, und insbesondere von Papiersorten für Wellpappe, von LWC-Papier dadurch zu verringern, dass organische Substanzen, die gelöst oder im Wasser dispergiert sind, und/oder Stickies aus dem Herstellungswasser adsorbiert und fixiert werden.
  15. Verwendung nach Anspruch 14, dadurch gekennzeichnet, dass der mikronisierte pflanzliche Zusatzstoff aus landwirtschaftlichen Nebenprodukten stammt.
  16. Verfahren zur Herstellung einer Bahn aus Papier oder Pappe, dadurch gekennzeichnet, dass es das Beimischen eines Systems nach einem beliebigen der Ansprüche 1 bis 8 in die Fasersuspension gemäß einem System/Fasern-Gewichtsverhältnis im Bereich von 0,2/100 bis 30/100, vorzugsweise einem Gewichtsverhältnis im Bereich von 0,5/100 bis 10/100, umfasst.
EP06808120A 2005-09-13 2006-09-13 Papiersystem zur minderung von abscheidungen und verstopfungen auf einer maschine bei der papier- und kartonherstellung Not-in-force EP1931826B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200631426T SI1931826T1 (sl) 2005-09-13 2006-09-13 Papirni sistem za zmanjšanje usedlin in zamašitev na stroju pri pripravi papirja in kartona
PL06808120T PL1931826T3 (pl) 2005-09-13 2006-09-13 System papierniczy do zmniejszania osadów i zabrudzeń maszyny podczas wytwarzania papieru i tektury

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0509299A FR2890664B1 (fr) 2005-09-13 2005-09-13 Additif vegetal micronise active pour l'adsorption de substances organiques contenues dans les eaux de fabrication de papiers et cartons avec fibres recyclees pour la diminution des encrassements
PCT/FR2006/002094 WO2007031642A2 (fr) 2005-09-13 2006-09-13 Système papetier pour la diminution des dépôts et encrassements sur machine au cours de la fabrication de papiers et cartons

Publications (2)

Publication Number Publication Date
EP1931826A2 EP1931826A2 (de) 2008-06-18
EP1931826B1 true EP1931826B1 (de) 2012-06-20

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Application Number Title Priority Date Filing Date
EP06808120A Not-in-force EP1931826B1 (de) 2005-09-13 2006-09-13 Papiersystem zur minderung von abscheidungen und verstopfungen auf einer maschine bei der papier- und kartonherstellung

Country Status (7)

Country Link
EP (1) EP1931826B1 (de)
ES (1) ES2391835T3 (de)
FR (1) FR2890664B1 (de)
PL (1) PL1931826T3 (de)
PT (1) PT1931826E (de)
SI (1) SI1931826T1 (de)
WO (1) WO2007031642A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112014002060A2 (pt) * 2011-07-28 2017-02-21 Cargill Inc composições para uso na seção úmida da fabricação de papel

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492425A1 (fr) * 1980-10-21 1982-04-23 Gascogne Papeteries Procede de preparation par des techniques papetieres d'un materiau en feuille avec une retention sur machine amelioree, materiau en feuille ainsi obtenu et son application notamment dans le domaine de l'impression-ecriture, de l'emballage et des revetements
FR2624531B1 (fr) * 1987-12-14 1989-10-20 Gomez Daniel Procede de preparation d'un materiau contenant une charge vegetale, utilisation notamment dans le domaine des papiers et cartons
IT1265988B1 (it) * 1993-09-21 1996-12-16 Favini Cartiera Spa Carta contenente polpe di barbabietole da zucchero in forma integrale e procedimento per la sua produzione
IT1265989B1 (it) * 1993-09-28 1996-12-16 Favini Srl Carta ad elevato contenuto di sostanze vegetali integrali e procedimento per la sua produzione

Also Published As

Publication number Publication date
WO2007031642A3 (fr) 2007-06-14
FR2890664A1 (fr) 2007-03-16
WO2007031642A2 (fr) 2007-03-22
SI1931826T1 (sl) 2012-11-30
PT1931826E (pt) 2012-09-26
EP1931826A2 (de) 2008-06-18
FR2890664B1 (fr) 2013-02-15
ES2391835T3 (es) 2012-11-30
PL1931826T3 (pl) 2012-12-31

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